Intervals:Random interval from a user defined list of up to 2 octaves or based on selected notes or a specific mode / scale. Interval can be ascending, descending or harmonic.

Clusters:Up to 9 notes can be played with a variable arpegiation speed.

Phrases:3 to 10 notes - based on selected intervals / selected notes / or a scale / mode. Set the pitch range and rhythm.

Modes / scales:Identify the mode or scale being played - ascending or descending.

Features:Set tempo, instrument and note velocity.Listen feature to compare intervals or to practise singing them.Helps to associate intervals with common melodies to make them easier to learn and remember. Options to replay correct and / or incorrect answers to hear the difference.

Continuous Play - repeat question a set number of times then display the answer, then move on to next question. Option to use text to speech to announce root note and answers. Very basic speech recognition - when guessing ascending or descending intervals say the note name or commands Repeat, Root Note, Pause, Stop or Next.

Uses Google AdMob to display adverts. The Donate version does not include adverts.Uses Google Analytics to track which features are being used most. Uses BugSense crash reporting.